4 Maintenance and inspection
4-2 Checking the battery
BU5002R/BU3002R/BU3002RH
95
4
4-2 Checking the battery
Warning
Do not disassemble or modify the battery.
⚫
There is a risk of leakage of dilute sulfuric acid, causing blindness or
injury if touched.
The lead battery used in the UPS has a limited lifespan.
(The life varies depending on your storage/use environment and backup frequency.)
The nearer the end of the life is, the more rapidly deterioration proceeds.
4-2-1 Battery life expectancy (* Not guaranteed performance)
Ambient
temperature
Expected
battery life
25°C
5 years
30°C
3.5 years
35°C
2.5 years
40°C
1.7 years
4-2-2 Methods for checking the battery
There are 2 types of battery inspection method.
• Perform the self-diagnosis test. (See page 94)
• Measure the backup time. (See page 96)
By measuring the backup time, the battery life can be determined more accurately.
Change the battery when the measured value reaches the “initial value of the backup time”
or when half or less of the value calculated using the
graph in “Estimated backup time” on
page 97.
• When comparing the initial value of backup time measured by the customer and the
current backup time, it is not possible to make an accurate judgment unless the capacity
of the devices connected to the UPS is the same as that when the initial value was
measured.
